A588

A588 is a high-strength low-alloy steel plate used in structural applications such as bridges and buildings. Its advantage over A572 50 is its “weathering” ability, which provides atmospheric corrosion resistance and ultimately longer life in applications where exposure to elements will be a factor. We generally stock this material as A588 Gr A & B in plate and 606 in sheet.

Mechanical Properties A588:

Tensile: 70 ksi min (4” and under), 67 ksi min (4”- 5”) 63 ksi min (Over 5”-8”)
Yield: 50 ksi min (4” and under), 46 ksi min (4”- 5”) 42 ksi min (Over 5”-8”)
Elongation: 16% min in 8” 19% min in 2” (for plates wider than 24”)

The Properties of ASTM A588 Steel Plates, Grade A:

Properties	Metric	English	Comments
Density	7.87 g/cc	0.284 lb/in2	Typical of ASTM Steel
Tensile Strength at Break	>=483 MPa	>=70000 psi	Varies with size and form
Tensile Strength, Yield	>=345 MPa	>=50000 psi	Varies with size and form
Elongation at Break	>= 18%	>=18%	in 200 mm (8 in.); Varies with size and form
	>= 21 %	>=21%	in 50 mm (2 in.); Varies with size and form
Modulus of Elasticity	205 GPa	29700 ksi	Typical for steel
Poissons Rtio	0.28	0.28	Calculated
Shear Modulus	80.0 GPa	11600 ksi	Typical for steel
Carbon, C	0.10-0.19%	0.10-0.19%
Chromium, Cr	0.40-0.65%	0.40-0.65%
Copper, Cu	.025-0.40%	0.25-0.40%
Iron, Fe	97-98.2%	97-98.2%	as balance
Manganese, Mn	0.90-1.25%	0.90-1.25%
Phosphorous, P	<= 0.040 %	<= 0.040 %
Silicon, Si	0.15-0.30%	0.15-0.30%
Sulfur, S	<= 0.040 %	<= 0.040 %
Vanadium, V	0.020-0.10%	0.020-0.10%